How to determine OpenCV version

Question

How to determine which version of OpenCV I have installed?

I am most interested in knowing a way of doing it programatically (and cross-platform), but I can

Answer 1

if you are working under Windows and you need to configure Codeblocks or any other IDE (thus,you can not issue any command yet nor compile a program ) you can simply go to the folder of installation of OpenCV and look after the final leters of the libraries in the sub-folder "/lib" .All libraries there are named in a pattern that reflects the major,minor and the revision of the build of OpenCV.For instance if you stumble upon a file named opencv_ts300.lib or opencv_world300.lib then the major is 3,minor is 0 and revision is 0.

(Note: it's likely that this method fails I mean when these informations do not comply with the real version but this will be maybe with the revision but unlikely with the major)